Wireless microphone



FIG. 1 is a top, front, left side perspective view of a wireless microphone, showing my new design;

FIG. 2 is a top, rear, right side perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines are included to show features that form no part of the claimed design. 

CLAIM The ornamental design for a wireless microphone, as shown and described. 